Next week’s inauguration graphically poses the specter of America’s President, our prime constitutional defender from national security threats, becoming a leading threat himself. How did this happen, and how can we mitigate this problem, over the short and long run? Harold Hongju Koh, Herman Phleger Visiting Professor of Law at Stanford for Winter Term 2025, Sterling Professor of International Law and former Dean at Yale Law School, has served four presidents during the last five decades, including stints in both the Obama and Biden Administrations as top lawyer in the State Department. He has also been Ukraine’s counsel before international courts in four cases since 2017.  The recipient of 18 honorary degrees and awards from the ABA, Columbia and Duke Law Schools, and the  Robert Katzmann Award for Academic Excellence for his lifetime achievements in international law, Professor Koh will address these pressing questions in discussing his last two books: The National Security Constitution in the 21st Century (Yale 2024) and The Trump Administration and International Law (Oxford 2019), both available for purchase at the event and from the Stanford Book Store.